I have a 4160 holley 750 carb,the car has been a slug on the top end so with the
air cleaner off lookind down in to the carb
I slamed the lever to full throttle fast
hopeing to see the secondaries open at least move, no luck.not even a mm.
Am I doing the right test is there a better way to find out please help..

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86 T/A L98 with T-5(orig an LG4)
Hooker headers
Performer RPM intake
holley 750cfm carb
cast iron 76cc heads with
2.02-1.60 valves
B&M ripper
Richmond 4.10's
Flowmaster
9.43@74mph 1/8 mile.

 

That test won't work. If they open doing that test, something is wrong. Unhook the secondaries and run it--you should notice a reduction in power. They are probably working--you shouldn't 'feel' them open if they open correctly.


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350 with stealth intake, holley carb, 470 lift cam. 700r4 with .5 boost valve, vette servo, tci lock-up kit, B&M megashifter. Richmond 3.73 gears, powertrax locker, timkin bearings, synthetic lube. Custom 3 inch single into 2 2.5 pipes. 1 1/2 drop springs, 1 5/16 solid front sway bar, 1 inch rear bar, custom subframe connectors, custom LCA relocation brackets. Kobel ground FX, current red metallic paint. Lots of other stuff...
82camaro

 

82 Camaro's right.

 

You could put a paper clip on the secondary vacuum diaphram rod next to the vacuum can. Go tromp on it and see if it moves down the lever.
Or, wire the secondary linkage together to the primary with a small piece of wire and see if it runs better.

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